National Semiconductor DS10CP154A Technical data
DS10CP154A
1.5 Gbps 4x4 LVDS Crosspoint Switch
DS10CP154A 1.5 Gbps 4x4 LVDS Crosspoint Switch
August 12, 2008
General Description
The DS10CP154A is a 1.5 Gbps 4x4 LVDS crosspoint switch
optimized for high-speed signal routing and switching over
FR-4 printed circuit board backplanes and balanced cables.
Fully differential signal paths ensure exceptional signal integrity and noise immunity. The non-blocking architecture
allows connections of any input to any output or outputs. The
switch configuration can be accomplished via external pins or
the System Management Bus (SMBus) interface. In addition,
the SMBus circuitry enables the loss of signal (LOS
that can inform a system of the presence of an open inputs
condition (e.g. disconnected cable).
Wide input common mode range allows the switch to accept
signals with LVDS, CML and LVPECL levels; the output levels
are LVDS. A very small package footprint requires a minimal
space on the board while the flow-through pinout allows easy
board layout. Each differential input and output is internally
terminated with a 100Ω resistor to lower return losses, reduce
component count and further minimize board space.
) monitors
Typical Application
Features
DC - 1.5 Gbps low jitter, low skew, low power operation
■
Pin and SMBus configurable, fully differential, non-
■
blocking architecture
Wide input common mode range enables DC coupled
■
interface to CML or LVPECL drivers
circuitry detects open inputs fault condition
LOS
■
On-chip 100 Ω input and output termination minimizes
■
insertion and return losses, reduces component count and
minimizes board space
8 kV ESD on LVDS I/O pins protects adjoining
■
components
Small 6 mm x 6 mm LLP-40 space saving package
■
Applications
High-speed channel select applications
■
Clock and data buffering and muxing
■
SD / HD SDI Routers
■
30073703
© 2008 National Semiconductor Corporation 300737 www.national.com
Ordering Code
NSID Function
DS10CP154ATSQ Crosspoint Switch
DS10CP154A
Block Diagram
30073701
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Connection Diagram
DS10CP154A
DS10CP154A Pin Diagram
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Pin Descriptions
Pin Name Pin
DS10CP154A
IN0+, IN0- ,
IN1+, IN1-,
IN2+, IN2-,
IN3+, IN3-
OUT0+, OUT0-,
OUT1+, OUT1-,
OUT2+, OUT2-,
OUT3+, OUT3-
EN_smb 17 I, LVCMOS System Management Bus (SMBus) mode enable pin. The pin has
S00/SCL,
S01/SDA
S10/ADDR0,
S11/ADDR1
S20/ADDR2,
S21/ADDR3
S30, S31 13, 14 I, LVCMOS For EN_smb = [0], these pins select which LVDS input is routed
PWDN 38 I, LVCMOS For EN_smb = [0], this is the power down pin. When the PWDN is
NC 11, 12,
VDD 3, 8,
GND 16, DAP Power Ground pin and pad (DAP - die attach pad).
Number
1, 2,
4, 5,
6, 7,
9, 10
29, 28,
27, 26,
24, 23,
22, 21
37,
36
35,
34
33,
32
18, 19,
20, 31,
39, 40
15,25, 30
I/O, Type Pin Description
I, LVDS Inverting and non-inverting high speed LVDS input pins.
O, LVDS Inverting and non-inverting high speed LVDS output pins.
an internal 20k pull down. When the pin is set to a [1], the device
is in the SMBus mode. All SMBus registers are reset when the pin
is toggled.
I/O, LVCMOS For EN_smb = [1], these pins select which LVDS input is routed
to the OUT0.
In the SMBus mode, when the EN_smb = [1], these pins are the
SMBus clock input and data I/O pins respectively.
I/O, LVCMOS For EN_smb = [0], these pins select which LVDS input is routed
to the OUT1.
In the SMBus mode, when the EN_smb = [1], these pins are the
User-Set SMBus Slave Address inputs.
I/O, LVCMOS For EN_smb = [0], these pins select which LVDS input is routed
to the OUT2.
In the SMBus mode, when the EN_smb = [1], these pins are the
User-Set SMBus Slave Address inputs.
to the OUT3.
In the SMBus mode, when the EN_smb = [1], these pins are nonfunctional and should be tied to either logic [0] or [1].
set to a [0], the device is in the power down mode. The SMBus
circuitry can still be accessed provided the EN_smb pin is set to a
[1].
In the SMBus mode, the device is powered up by either setting the
PWDN pin to [1] OR by writing a [1] to the Control Register D[7]
bit ( SoftPWDN). The device will be powered down by setting the
PWDN pin to [0] AND by writing a [0] to the Control Register D[7]
bit ( SoftPWDN).
No connect pins. May be left floating.
Power Power supply pins.
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DS10CP154A
Absolute Maximum Ratings (Note 4)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage −0.3V to +4V
LVCMOS Input Voltage −0.3V to (VCC + 0.3V)
LVCMOS Output Voltage −0.3V to (VCC + 0.3V)
LVDS Input Voltage −0.3V to +4V
LVDS Differential Input Voltage 0V to 1.0V
LVDS Output Voltage −0.3V to (VCC + 0.3V)
LVDS Differential Output Voltage 0V to 1.0V
LVDS Output Short Circuit Current
Duration
Junction Temperature +150°C
Storage Temperature Range −65°C to +150°C
Lead Temperature Range
Soldering (4 sec.) +260°C
Maximum Package Power Dissipation at 25°C
SQA Package 4.65W
Derate SQA Package 37.2 mW/°C above +25°C
5 ms
Package Thermal Resistance
θ
θ
JA
JC
+26.9°C/W
+3.8°C/W
ESD Susceptibility
HBM (Note 1)
MM (Note 2)
CDM (Note 3)
Note 1: Human Body Model, applicable std. JESD22-A114C
Note 2: Machine Model, applicable std. JESD22-A115-A
Note 3: Field Induced Charge Device Model, applicable std.
JESD22-C101-C
≥8 kV
≥250V
≥1250V
Recommended Operating Conditions
Min Typ Max Units
Supply Voltage (VCC) 3.0 3.3 3.6 V
Receiver Differential Input
Voltage (VID)
Operating Free Air
Temperature (TA)
SMBus (SDA, SCL) 3.6 V
0 1.0 V
−40 +25 +85 °C
Electrical Characteristics
Over recommended operating supply and temperature ranges unless otherwise specified. (Notes 5, 6, 7)
Symbol Parameter Conditions Min Typ Max Units
LVCMOS DC SPECIFICATIONS
V
IH
V
IL
I
IH
I
IL
V
CL
V
OL
LVDS INPUT DC SPECIFICATIONS
V
ID
V
TH
V
TL
V
CMR
I
IN
C
IN
R
IN
High Level Input Voltage 2.0 V
DD
Low Level Input Voltage GND 0.8 V
High Level Input Current VIN = 3.6V
VCC = 3.6V
Low Level Input Current VIN = GND
0 ±10
EN_smb pin 40 175 250
0 ±10
VCC = 3.6V
Input Clamp Voltage ICL = −18 mA, VCC = 0V −0.9 −1.5 V
Low Level Output Voltage IOL= 4 mA SDA pin 0.4 V
Input Differential Voltage 0 1 V
Differential Input High Threshold
Differential Input Low Threshold
VCM = +0.05V or VCC-0.05V
0 +100 mV
−100 0 mV
Common Mode Voltage Range VID = 100 mV 0.05 VCC -
0.05
Input Current
VIN = 3.6V or 0V
VCC = 3.6V or 0V
Input Capacitance Any LVDS Input Pin to GND
Input Termination Resistor Between IN+ and IN-
±1 ±10
1.7 pF
100
V
μA
μA
μA
V
μA
Ω
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Symbol Parameter Conditions Min Typ Max Units
LVDS OUTPUT DC SPECIFICATIONS
V
OD
ΔV
DS10CP154A
V
OS
ΔV
I
OS
C
OUT
R
OUT
Differential Output Voltage
Change in Magnitude of VOD for Complimentary
OD
Output States
Offset Voltage
Change in Magnitude of VOS for Complimentary
OS
Output States
RL = 100Ω
RL = 100Ω
250 350 450 mV
-35 35 mV
1.05 1.2 1.375 V
-35 35 mV
Output Short Circuit Current (Note 8) OUT to GND -25 -55 mA
OUT to V
CC
Output Capacitance Any LVDS Output Pin to GND
Output Termination Resistor Between OUT+ and OUT-
7 55 mA
1.2 pF
100
SUPPLY CURRENT
I
I
CC1
CC2
Supply Current PWDN = 0 40 50 mA
Supply Current PWDN = 1
103 125 mA
Broadcast Mode (1:4)
I
CC3
Supply Current PWDN = 1
115 140 mA
Quad Buffer Mode (4:4)
Note 4: “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur, including inoperability and degradation of device reliability
and/or performance. Functional operation of the device and/or non-degradation at the Absolute Maximum Ratings or other conditions beyond those indicated in
the Recommended Operating Conditions is not implied. The Recommended Operating Conditions indicate conditions at which the device is functional and the
device should not be operated beyond such conditions.
Note 5: The Electrical Characteristics tables list guaranteed specifications under the listed Recommended Operating Conditions except as otherwise modified
or specified by the Electrical Characteristics Conditions and/or Notes. Typical specifications are estimations only and are not guaranteed.
Note 6: Current into device pins is defined as positive. Current out of device pins is defined as negative. All voltages are referenced to ground except VOD and
ΔVOD.
Note 7: Typical values represent most likely parametric norms for VCC = +3.3V and TA = +25°C, and at the Recommended Operation Conditions at the time of
product characterization and are not guaranteed.
Note 8: Output short circuit current (IOS) is specified as magnitude only, minus sign indicates direction only.
Ω
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